Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 64745 10.2205/2024ES000879 xvpfok ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Water Content and Pb Concentrations in the Bottom Sediments Of The Gdansk Deep (South-Eastern Baltic Sea) According to the Portable X-Ray Fluorescence Analyzer Olympus Vanta C Влажность и содержание свинца в донных осадках Гданьской впадины (ЮВ Балтика) по данным портативного рентгено-флуоресцентного анализатора Olympus Vanta C https://orcid.org/0009-0009-5899-1699 Ласкина Д. Н. Laskina D. N. drlaskina@gmail.com https://orcid.org/0000-0002-0079-7342 Дорохова Е. В. Dorokhova E. V. https://orcid.org/0000-0001-7612-4454 Королева Ю. В. Koroleva Yu. V. Балтийский федеральный университет им. Иммануила Канта Immanuel Kant Baltic Federal University Институт океанологии им. П.П. Ширшова РАН P.P.Shirshov Institute of Oceanology of the Russian Academy of Science 12 07 2024 12 07 2024 24 3 1 17 10 06 2023 10 11 2024 https://rjes.ru/en/nauka/article/64745/view

В данной работе на примере донных осадков из Гданьской впадины Балтийского моря описан метод определения влажности донных отложений, который основан на анализе спектральных данных, полученных с помощью портативного рентгенофлуоресцентного анализатора (РФА) Olympus Vanta C. Значения влажности, рассчитанные по данным портативного РФА и измеренные классическим методом высушивания до постоянной массы, показали высокую корреляцию (𝑟 = 0.95). На этом основании результаты анализа элементного состава осадка натуральной влажности с помощью Olympus Vanta C были пересчитаны на сухой осадок. Сравнение пересчитанных данных с портативного анализатора и данных элементного анализа сухих гомогенизированных проб на волнодисперсионном РФА Спектроскан-Макс-G, а также атомно-абсорбционном спектрофотометре Varian AA240FS показало высокие коэффициенты корреляции содержаний Mn, Ca, K, Zn, Pb, As и низкие коэффициенты – для Fe, Co, Ti, Ni, Cu и Sr. Результаты анализа портативным рентгенофлуоресцентным спектрометром, пересчитанные на сухой вес осадка, были использованы для изучения распределения концентраций свинца в донных отложениях Гданьской впадины. В верхних горизонтах осадочной толщи выявлен рост содержания свинца до 60 ppm. Такое увеличение, вероятно, связано с интенсификацией антропогенной деятельности в 1 и 1200 г. н. э. Максимальные значения концентраций свинца до 124 ppm приходятся на приповерхностные осадки, относящиеся, вероятно, к периоду индустриализации 1970-х гг.

This work describes a method for determining the water content in sediments from the Gulf of Gdansk of the Baltic Sea, which is based on the analysis of spectral data obtained using the portable X-ray fluorescence analyzer (XRF) Olympus Vanta C. The water content calculated from the XRF spectral data showed a high correlation (𝑟 = 0.95) with those measured using the conventional method of drying to constant mass. This allows the conversion between the results obtained using the portable XRF analyzer on bulk sediments to those obtained on dried sediments. Comparison of the converted data from the portable analyzer with the results of element composition analysis performed on dried homogenized samples using the wavelength-dispersive XRF analyzer Spectroscan-Max-G and atomic absorption spectrophotometer Varian AA240FS showed high correlation coefficients for Mn, Ca, K, Zn, Pb, As and low coefficients for Fe, Co, Ti, Ni, Cu and Sr. The results of the analysis using the portable XRF spectrometer, converted to dry weight of the sediment, were used to study the distribution of Pb concentrations in the sediments of the Gulf of Gdansk. An increase in Pb content up to 60 ppm was observed in the upper part of sediment cover. This increase is likely associated with the intensification of anthropogenic activities in AD 1 and AD 1200. Maximum lead concentrations up to 124 ppm were found in near-surface sediments, likely related to the period of industrialization in the 1970s.

 колонки донных осадков Спектроскан-Макс-G рэлеевское и комптоновское рассеяние антропогенный источник поступления свинца sediment cores Spectroscan-Maks-G coherent and incoherent scattering anthropogenic source of lead input Авторы благодарят профессора Дж. Ф. Бойла за помощь в определе- нии влажности из спектров рассеяния, Д. Г. Борисова за плодотворное обсуждение результатов и стилистические правки текста, а также Е. П. Жолинскую за выполнение химических анализов на ААС. Мы также благодарим двух анонимных рецензентов, чьи замечания позволили значительно улучшить статью. Изучение влажности и сопостав- ление значений содержаний элементов выполнено в рамках госзадания ИО РАН (тема № FMWE-2024-0025), исследования распределения свинца в колонках донных осадков выполнено в рамках гранта РНФ № 22-17-00170, https://rscf.ru/project/22-17-00170/. The authors thank Professor J. F. Boyle for assistance in determining the humidity from the scattering spectra, D. G. Borisov for fruitful discussion of the results and stylistic corrections of the text, and E. P. Zholinskaya for performing chemical analyses on AAS. We also thank two anonymous reviewers, whose comments allowed us to significantly improve the article. The study of humidity and comparison of element content values ​​was carried out within the framework of the state assignment of the IO RAS (topic No. FMWE-2024-0025), the study of lead distribution in bottom sediment cores was carried out within the framework of the RSF grant No. 22-17-00170, https://rscf.ru/project/22-17-00170/.

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